Multi-stage filtering device

Abstract

The utility model belongs to the field of laboratory devices, and relates to a multi-stage filtering device which comprises an iron stand, an iron ring I, an iron ring II, an injector, a funnel, a transmission pipe, an intercepting clamp, a needle type filter and a beaker. The height of the first iron ring and the height of the second iron ring can be adjusted. A syringe opening protruding outwards is formed in the lower position of the outer side of the syringe cavity; the injector can be placed on the first iron ring, and the funnel can be placed on the second iron ring. The injector opening is connected with the funnel lower end outlet through a transmission pipe. During filtering, a solution to be filtered is transferred into a funnel with filter paper, and the solution is subjected to primary filtering through the filter paper; the closure clip is opened, and the push rod of the injector is pulled upwards, so that negative pressure is formed in the cavity of the injector, the first-stage filtering efficiency can be improved, and a solution subjected to first-stage filtering can enter the cavity of the injector through the transmission pipe; and the intercepting clamp is closed, the push rod of the injector is pushed downwards, the solution is subjected to secondary filtration through the needle type filter and finally enters the beaker, and the multi-stage filtration process is completed.

Description

Technical Field

[0001] The utility model belongs to the field of laboratory devices and relates to a multi-stage filtering device, in particular to a multi-stage filtering device capable of improving filtering efficiency. Background Art

[0002] Filtration is a common operation for separating solids and liquids. The conventional filtration method is achieved through filter paper. Simple atmospheric pressure filtration often has a low filtration rate and low efficiency. In addition, some precipitates in the solution to be filtered are relatively fine, and multi-stage filtration is often required. Summary of the invention

[0003] The utility model is beneficial in that it can provide a multi-stage filtering device, and in particular, it relates to a multi-stage filtering device that can improve filtering efficiency.

[0004] In order to realize the above functions, the utility model relates to a multi-stage filtering device, which is characterized by comprising an iron frame 1, an iron ring 1 2, an iron ring 2 3, a syringe 4, a funnel 6, a transmission tube 7, a cut-off clamp 8, a needle filter 9 and a beaker 10.

[0005] Among them, the iron ring 1 2 and the iron ring 2 3 can adjust the height.

[0006] The syringe 4 cavity has a syringe opening 5 protruding outward at the lower outer side.

[0007] The syringe 4 can be placed on the iron ring 1 2 , and the funnel 6 can be placed on the iron ring 2 3 .

[0008] The syringe opening 5 and the lower end outlet of the funnel 6 are connected through a transfer tube 7 .

[0009] Beneficial effects: The utility model relates to a multi-stage filtering device with a simple structure, convenient operation, time-saving and labor-saving. When filtering, the solution to be filtered is transferred to a funnel with filter paper, and the solution begins to be filtered through the filter paper for primary filtration; the interception clamp is opened, and the syringe push rod is pulled upward, so that negative pressure is formed in the syringe cavity, which not only improves the efficiency of the primary filtration, but also the solution after the primary filtration can enter the syringe cavity through the transmission tube; the interception clamp is closed, and the syringe push rod is pushed downward, and the solution is filtered through the needle filter for secondary filtration, and finally enters the beaker, completing the multi-stage filtration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 . Schematic diagram of the utility model;

[0011] Figure 2 .Cross-sectional view of the utility model.

[0012] Among them: 1. Iron stand; 2. Iron ring one; 3. Iron ring two; 4. Syringe; 5. Syringe opening; 6. Funnel; 7. Transfer tube; 8. Shutoff clamp; 9. Needle filter; 10. Beaker. DETAILED DESCRIPTION

[0013] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0014] Embodiment 1

[0015] When filtering, first fold the filter paper and place it in the funnel, transfer the solution to be filtered into the funnel, and the solution begins to pass through the filter paper for primary filtration; then open the interception clamp and pull the syringe push rod upward, and negative pressure is formed in the syringe cavity, which not only improves the efficiency of primary filtration, but also allows the solution after primary filtration to enter the syringe cavity through the transmission tube; close the interception clamp and push the syringe push rod downward, and the solution passes through the needle filter for secondary filtration and finally enters the beaker, completing the multi-stage filtration process. The height of the first and second iron rings can also be adjusted to accommodate syringes, funnels and beakers of different specifications.

[0016] The above embodiments are only used to illustrate the utility model, and are not intended to limit the patent of the utility model. It should be pointed out that a person skilled in the art can make various changes and modifications without departing from the scope of the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the coverage of the claims of the utility model.

Claims

1. A multi-stage filtering device, characterized in that: The invention comprises an iron stand (1), an iron ring 1 (2), an iron ring 2 (3), a syringe (4), a funnel (6), a transmission tube (7), a flow cut-off clamp (8), a needle filter (9) and a beaker (10); wherein the heights of the iron ring 1 (2) and the iron ring 2 (3) are adjustable; the syringe (4) cavity has a syringe opening (5) protruding outward at the lower outer side; the syringe (4) can be placed on the iron ring 1 (2), and the funnel (6) can be placed on the iron ring 2 (3); the syringe opening (5) and the lower end outlet of the funnel (6) are connected via a transmission tube (7).

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